CN107140717A - A kind of graphene/NiO nano composite aerogel capacitive desalination electrodes and preparation method thereof - Google Patents
A kind of graphene/NiO nano composite aerogel capacitive desalination electrodes and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
Abstract
The invention discloses a kind of graphene/NiO nano composite aerogel capacitive desalination electrodes and preparation method thereof, electrode includes electrode material and graphite paper substrates, and electrode material includes graphene/NiO nano composite aerogel components.The preparation method of electrode is to mix graphene/NiO nano composite aerogels with conductive agent and binding agent, it is coated in by rubbing method in graphite paper substrates, dry, the electric capacity for producing the graphene/NiO nano composite aerogel capacitive desalination electrodes electrode is obviously improved, and is used it for capacitive desalination and is shown the big advantage of adsorbance.
Description
Technical field
The present invention relates to a kind of capacitive desalination electrode, and in particular to one kind is lived comprising graphene/NiO nano composite aerogels
Capacitive desalination electrode of property component and preparation method thereof, belongs to technical field of nanometer material preparation.
Background technology
Freshwater resources are the natural resources that human society is depended on for existence, but the water of the earth 98% is by seawater and salt water group
Into, in addition, the salt not waited containing concentration also in waste water, salt ion enters environment may contaminated soil and underground water, harm
It is biological.Therefore the desalting technology of development high efficiency low cost can improve a substantial solution to solve water demand.
Low driving energy, low cost, the capacitive deionization technology (CapacitiveDesalination, abbreviation CDI) of non-secondary pollution
Arise at the historic moment.Capacitive deionization technical principle is：By applying electrostatic field in electrode material, certain density electrolyte solution leads to
It is out-of-date that ion can be forced to movement at the electrode with opposite charges, reach and electrolysis is enriched with the electric double layer at electrode material interface
Matter, so as to reach the purpose of reduction solution electrolyte concentration.Capacitive desalination and ultracapacitor (electric double layer type) general principle phase
Together, but capacitive desalination process concern material (ion) storage and release, and ultracapacitor emphasizes the storage and release of energy.
Compared with traditional desalination process, a CDI important feature：Desalination processes are along with the storage of energy, and this portion of energy can be with
Similar ultracapacitor discharge process is re-used.Than traditional desalination process, cost is low, desalting efficiency is high, process equipment
Simply, without secondary pollution, environment amenable advantage, capacitive deionization technology has in fields such as desalinization, waste water desalinations
There is good utilization prospect, and become the focus studied now.
Its unique structure of graphene assigns the performances such as excellent electricity, mechanics, calorifics, the optics of graphene, however, intrinsic
Chemical inertness that graphene is shown, difficult scattered, the π-π interactions of piece interlayer and model ylid bloom action promote graphene to send out
Raw irreversible cohesion, this turns into the huge obstacle that grapheme two-dimension material is applied in some fields, the easy agglomeration of graphene
It result in its technology of preparing condition harsh, low yield.Therefore the agglomeration traits, yield issues and raising graphene of graphene are solved
Specific capacitance is the key for realizing that graphene capacitive desalination is practical.In recent years, graphene is manipulated to be assembled into different dimensions (one
It is dimension, two dimension, three-dimensional) macroscopic body material, as one of mostly important research direction of graphene, obtained through specific assembling mode
Three-dimensional grapheme material, and the property of graphene two-dimensional slice can be showed to the full extent, for the macroscopical material of extension graphene
Material application is significant.Graphene aerogel (GA) is exactly a kind of typical three-dimensional grapheme material, and it has graphene
Nano-meter characteristic and aeroge macrostructure, and be a kind of there is high ratio with very strong mechanical strength, electronic conduction ability
Surface area, high porosity, the Nano-function thin films of good conduction and thermal conductivity and excellent mechanical strength, are deposited in the energy
The fields such as storage is with changing, water process and sensing are received significant attention..
For desalination electrode, high specific capacitance means high desalination amount.Although people do for Graphene electrodes
Numerous studies, and some interim achievements in research are achieved, but the electric charge of carbon electrode saves as two-dimensional process, occurs over just
The surface of electrode material, the specific capacitance of generation is smaller, largely governs further carrying for CDI technology desalting efficiencies
Rise.
The content of the invention
The problem above existed for prior art, the purpose of the present invention is to be to provide a kind of with pseudo capacitance
The capacitive desalination electrode of desalting effect is cooperateed with electric double layer capacitance, the graphene that the electrode is included/NiO nano composite aerogels are lived
Property component by nickel oxide incorporation graphene oxide provide higher faraday's electric capacity, significantly improve the electric capacity of composite
Desalting performance.
Another method of the present invention is to be to provide a kind of simple to operate, inexpensive to prepare the capacitive desalination electrode
Method.
In order to realize above-mentioned technical purpose, the invention provides a kind of capacitive desalination electrode, including electrode material and graphite
Paper substrates, the electrode material includes graphene/NiO nano composite aerogel components, the nano combined gas of graphene/NiO
Gel is made up of nano NiO growth in situ in the surface of three-dimensional network shape graphene aerogel and its hole.
Active component graphene/NiO nano composite aerogels are by nickel oxide nano piece in the capacitive desalination electrode of the present invention
Growth in situ is constituted on the graphene oxide aerosol skeleton surface with three-dimensional net structure, both perfect adaptations, aoxidizes stone
Black alkene aerosol has forceful electric power subconductivity ability, and specific surface area is high, and the characteristics of porosity is high improves composite and electrolysis
The contact interface of liquid, obtains higher electric double layer capacitance, and simultaneous oxidation nickel can provide higher faraday's electric capacity, and both cooperate with increasing
Effect, significantly improves the capacitive desalination performance of composite.
Nano-nickel oxide is introduced in technical scheme in graphene oxide aerosol, between the two excellent lacks mutual
Mend, synergistic function is remarkably reinforced.Graphene aerogel has a good three-dimensional net structure of stability, big excellent of specific surface area
Point, but it only has electric double layer capacitance, and specific capacitance is not high, and easily reunites.And nickel oxide growth in situ is in graphene aerogel
Surface and micropore in, on the one hand graphene aerogel surface electrochemistry performance is entered using the high Faraday pseudo-capacitance of nickel oxide
Row is modified, and is improved the electric capacity of composite, is significantly improved the capacitive desalination performance of material, on the other hand utilize part nanometer
In the micropore of NiO insertion graphene oxides, the problem of graphene is easily reunited is solved, the stability of composite is improved.
It is preferred that scheme, the electrode material is made up of graphene/NiO nano composite aerogels, conductive agent and binding agent.
The electrode material further preferably be by graphene/NiO nano composite aerogels, acetylene black and Kynoar in mass ratio
7~9:0.5~1.5:0.5~1.5 composition；Most preferably graphene/NiO nano composite aerogels, acetylene black and gather inclined fluorine
Ethene in mass ratio 8:1:1 composition.
More preferably scheme, the graphene/NiO nano composite aerogels are prepared by following methods：Oxygen-containing fossil
The solution of ink and nickel salt and precipitating reagent, carries out hydro-thermal reaction at a temperature of 140 DEG C~220 DEG C, obtains presoma；The presoma
After freeze-drying, it is placed under protective atmosphere, is heat-treated, produced at a temperature of 200 DEG C~300 DEG C.
The concentration of graphite oxide is in further preferred scheme, the solution containing graphite oxide and nickel salt and precipitating reagent
0.1~4g/L, the concentration of nickel salt are 0.01~0.06mol/L and the concentration of precipitating reagent is 0.03~0.3mol/L.Selection is closed
Suitable graphite oxide concentration is conducive to the formation of three-dimensional structure.
Nickel salt is with precipitating reagent mol ratio in preferred scheme, the solution containing graphite oxide and nickel salt and precipitating reagent
1:3~5.The formation of metal hydroxides can be promoted using suitable nickel salt and subsidence ratio, provided for nano-nickel oxide
Presoma.
Preferred scheme, the nickel salt is at least one of nickel chloride, nickel nitrate, nickel sulfate；Most preferably nickel nitrate.
Preferred scheme, the precipitating reagent is at least one of urea, ammoniacal liquor, ammonium hydrogen carbonate；More preferably urea.
Further preferred scheme, hydrothermal temperature is 160 DEG C~200 DEG C；The hydro-thermal reaction time is 5~20 hours,
Optimal the hydro-thermal reaction time is 12~18 hours.Temperature is too low, the time too short formation for being all unfavorable for presoma hydrogel.
Further preferred scheme, heat treatment temperature is 230~270 DEG C, and heat treatment time is 2~8 hours, optimal heat
Processing time is 3~4 hours.Temperature is too low, it is difficult to obtain pattern and the preferable nano-nickel oxide of crystal formation, too high temperature is to gas
Gel is destroyed, and reduces capacitance.
Present invention also offers a kind of preparation method of described capacitive desalination electrode, this method is to receive graphene/NiO
Rice composite aerogel is mixed with conductive agent and binding agent, is coated in by rubbing method in graphite paper substrates, is dried, is produced.
The specific preparation method of graphene/NiO nano composite aerogel desalination electrodes of the present invention is as follows：Graphene/NiO
Nano composite aerogel and acetylene black, Kynoar in mass ratio 8:1:1 mixing, adds appropriate 1-METHYLPYRROLIDONE molten
Agent, is stirred continuously to uniform, is applied on graphite paper, 150 DEG C of dryings 2 hours, obtains composite electrode piece.
The specific preparation method of graphene/NiO nano composite aerogels of the present invention is as follows：
Step 1)：Using graphite oxide as raw material, appropriate graphite oxide is dissolved in a certain amount of deionized water, stirred
To being completely dissolved, the graphite oxide aqueous solution is made into；
Step 2)：Nickel salt is dissolved in deionized water and added in the graphite oxide aqueous solution, it is molten that ultrasonic disperse obtains mixing
Liquid A；
Step 3)：In urea deionized water soluble in water and it will be added in the mixed liquor obtained by step 2, ultrasonic disperse is obtained
To mixed liquid B；In mixed liquid B the concentration of graphite oxide be 0.1~4g/L, the concentration of nickel salt be 0.01~0.06mol/L and
The concentration of precipitating reagent is 0.03~0.3mol/L；
Step 4)：Mixed liquid B is placed in sealing reactor at 140 DEG C~220 DEG C, reacted 5~20 hours；
Step 5)：Product is washed, and is freeze-dried 12 hours；
Step 6)：Calcine, 200 DEG C under nitrogen atmosphere~300 DEG C of step 5 products therefrom preferably 230 2~8 hours
~270 DEG C, calcine 3~4 hours；Obtain graphene/NiO nano composite aerogels；
Step 7)：Graphene/NiO nano composite aerogels and acetylene black, Kynoar in mass ratio 8:1:1 mixing,
Appropriate 1-METHYLPYRROLIDONE solvent is added, is stirred continuously to uniform, is applied on graphite paper, 150 DEG C of dryings 2 hours are obtained
Composite electrode piece.
Compared with the prior art, the advantageous effects that technical scheme is brought：
(1) capacitive desalination electrode of the invention includes graphene/NiO nano composite aerogels, and graphene/NiO nanometers multiple
Aeroge is closed by NiO nanometer sheets and the graphene aerogel perfect adaptation with three-dimensional net structure, graphene oxide aerosol
With forceful electric power subconductivity ability, good three-dimensional conductive network skeleton is provided for nickel oxide, while its specific specific surface area is high, hole
The characteristics of gap rate is high, improves the contact interface of composite and electrolyte, obtains higher electric double layer capacitance；And nickel oxide is equal
It is even to be dispersed in graphene oxide aerosol skeleton surface and be partially fill in graphene oxide hole, higher farad can be provided
Electric capacity, significantly improves the capacitive desalination performance of composite：When current density is 1A/g, specific capacitance reaches 265F/g, compared with
Pure graphene aerogel (190F/g) improves nearly 40%；During capacitive desalination, black alkene/NiO nano composite aerogel electrodes
Adsorbance be 10.2mg/g.
(2) preparation method of graphene/NiO nano composite aerogels is simple, efficiency high, cost are low, technique is simple, satisfaction
Demand of industrial production.
Brief description of the drawings
【Fig. 1】Shone for the graphene prepared by the embodiment of the present invention 2/NiO nano composite aerogels ESEM (SEM)
Piece.
【Fig. 2】For graphene aerogel scanning of materials Electronic Speculum (SEM) photo prepared by the embodiment of the present invention 1.
【Fig. 3】For the graphene prepared by the embodiment of the present invention 2/NiO nano composite aerogel constant current charge-discharge curves
Figure.
【Fig. 4】For the graphene prepared by the embodiment of the present invention 2/NiO nano composite aerogel cyclic voltammetry curves
Figure.
Embodiment
With reference to example, the present invention will be further described in detail, but the implementation of the present invention is not limited to this.
The method of testing of graphene/NiO nano composite aerogel chemical properties：By the nano combined airsettings of graphene/NiO
Glue, acetylene black, Kynoar (PVDF) in mass ratio 8:1:1 ratio is well mixed, and adds appropriate 1-METHYLPYRROLIDONE
(NMP) ultrasonic disperse 60min, stirs into after pasty state and is applied to area on 1cm2 circular shaped foam Ni substrates.The vacuum at 110 DEG C
Pole piece 12h is dried, 15MPa is forced into hydraulic press, 1min is kept, test pole piece used is produced.Wherein, using calomel electrode as ginseng
Than electrode, nickel foam is auxiliary electrode, using 6molL-1KOH solution as electrolyte, using three-electrode system in CHI660E electrifications
Learn and cyclic voltammetric, constant current charge-discharge, ac impedance measurement are carried out on work station.
Embodiment 1
The preparation of graphite oxide：Weigh 1g graphite powders to add in 90mL sulfuric acid and 10mL phosphoric acid mixed liquor, stirring
30min.It is slowly added to 6g potassium permanganate, 50 DEG C of water-bath, stirring, 16 hours of reaction.Add appropriate hydrogenperoxide steam generator extremely
React complete bubble-free to produce, solution is changed into glassy yellow from blackish green.Centrifugation, 5% hydrochloric acid, 95% alcohol, deionization washing
It is neutrality to wash product to supernatant.Vacuum drying, obtains graphite oxide.
100mg graphite oxides are taken to be dissolved in 100mL deionized waters, ultrasonic disperse 1h, to being completely dissolved.By 0.5816g six
Water nickel nitrate is dissolved in 20mL deionized waters and added into the above-mentioned graphite oxide aqueous solution, ultrasonic disperse 1h.By 0.48g urea
It is dissolved in 20mL deionized waters and adds in above-mentioned mixed liquor, ultrasonic disperse 1h.Above-mentioned solution is moved in 200mL reactors,
Under the conditions of 140 DEG C, 14h is reacted.Product is washed with deionized for several times, is freeze-dried 12h.Under nitrogen atmosphere, with 10 DEG C/min
Programming rate obtains graphene/NiO nano composite aerogels to 300 DEG C of calcining 4h.Electrochemical results show, in electric current
When density is 1A/g, specific capacitance is measured for 225F/g, purer graphene aerogel (190F/g) improves 19%.
The preparation of capacitive deionization electrode：By obtained graphene/NiO nano composite aerogels and acetylene black, gather inclined fluorine
Ethene in mass ratio 8:1:1 mixing, adds appropriate 1-METHYLPYRROLIDONE solvent, is stirred continuously to uniform, is applied to graphite paper
On, 150 DEG C of dryings 2 hours.Obtain composite electrode piece.
Desalting performance is tested：Above-mentioned made capacitive deionization electrode and device are assembled, desalination test is carried out.100mL
500mg/lNaCl prepare liquids are circulated with 25mL/min flow velocitys, the additional 1.3v direct currents of adsorption process.Voltage is treated by conductivity meter
Survey liquid change in concentration to be detected in real time, the adsorbance for drawing graphene/NiO nano composite aerogel electrodes is 6.4mg/g.
Embodiment 2
The preparation method be the same as Example 1 of graphite oxide.200mg graphite oxides are taken to be dissolved in 100mL deionized waters, ultrasound point
1h is dissipated, to being completely dissolved.The water nickel nitrates of 1.1632g six are dissolved in 20mL deionized waters and added water-soluble to above-mentioned graphite oxide
In liquid, ultrasonic disperse 1h.0.9610g urea is dissolved in 20mL deionized waters and added in above-mentioned mixed liquor, ultrasonic disperse 1h.
Above-mentioned solution is moved in 200mL reactors, under the conditions of 180 DEG C, 14h is reacted.Product is washed with deionized for several times, and freezing is dry
Dry 12h.Under nitrogen atmosphere, with 10 DEG C/min programming rates to 250 DEG C of calcining 4h, the nano combined airsettings of graphene/NiO are obtained
Glue.Electrochemical results show, when current density is 1A/g, measure specific capacitance for 265F/g, purer graphene aerogel
(190F/g) improves 40%.
The preparation of capacitive deionization electrode：By obtained graphene/NiO nano composite aerogels and acetylene black, gather inclined fluorine
Ethene in mass ratio 8:1:1 mixing, adds appropriate 1-METHYLPYRROLIDONE solvent, is stirred continuously to uniform, is applied to graphite paper
On, 150 DEG C of dryings 2 hours.Obtain composite electrode piece.
Desalting performance is tested：Above-mentioned made capacitive deionization electrode and device are assembled, desalination test is carried out.100mL
500mg/lNaCl prepare liquids are circulated with 25mL/min flow velocitys, the additional 1.3v direct currents of adsorption process.Voltage is treated by conductivity meter
Survey liquid change in concentration to be detected in real time, the adsorbance for drawing graphene/NiO nano composite aerogel electrodes is 10.2mg/g.
Embodiment 3
The preparation method be the same as Example 1 of graphite oxide.300mg graphite oxides are taken to be dissolved in 100mL deionized waters, ultrasound point
1h is dissipated, to being completely dissolved.The water nickel nitrates of 1.7448g six are dissolved in 20mL deionized waters and added water-soluble to above-mentioned graphite oxide
In liquid, ultrasonic disperse 1h.1.4414g urea is dissolved in 20mL deionized waters and added in above-mentioned mixed liquor, ultrasonic disperse 1h.
Above-mentioned solution is moved in 200mL reactors, under the conditions of 220 DEG C, 14h is reacted.Product is washed with deionized for several times, and freezing is dry
Dry 12h.Under nitrogen atmosphere, with 10 DEG C/min programming rates to 250 DEG C of calcining 4h, the nano combined airsettings of graphene/NiO are obtained
Glue.Electrochemical results show, when current density is 1A/g, measure specific capacitance for 251F/g, purer graphene aerogel
(190F/g) improves 32%.
The preparation of capacitive deionization electrode：By obtained graphene/NiO nano composite aerogels and acetylene black, gather inclined fluorine
Ethene in mass ratio 8:1:1 mixing, adds appropriate 1-METHYLPYRROLIDONE solvent, is stirred continuously to uniform, is applied to graphite paper
On, 150 DEG C of dryings 2 hours.Obtain composite electrode piece.
Desalting performance is tested：Above-mentioned made capacitive deionization electrode and device are assembled, desalination test is carried out.100mL
500mg/lNaCl prepare liquids are circulated with 25mL/min flow velocitys, the additional 1.3v direct currents of adsorption process.Voltage is treated by conductivity meter
Survey liquid change in concentration to be detected in real time, the adsorbance for drawing graphene/NiO nano composite aerogel electrodes is 8.4mg/g.
Embodiment 4
The preparation method be the same as Example 1 of graphite oxide.400mg graphite oxides are taken to be dissolved in 100mL deionized waters, ultrasound point
1h is dissipated, to being completely dissolved.The water nickel nitrates of 2.3264g six are dissolved in 20mL deionized waters and added water-soluble to above-mentioned graphite oxide
In liquid, ultrasonic disperse 1h.1.9220g urea is dissolved in 20mL deionized waters and added in above-mentioned mixed liquor, ultrasonic disperse 1h.
Above-mentioned solution is moved in 200mL reactors, under the conditions of 140 DEG C, 14h is reacted.Product is washed with deionized for several times, and freezing is dry
Dry 12h.Under nitrogen atmosphere, with 10 DEG C/min programming rates to 250 DEG C of calcining 4h, the nano combined airsettings of graphene/NiO are obtained
Glue.Electrochemical results show, when current density is 1A/g, measure specific capacitance for 235F/g, purer graphene aerogel
(190F/g) improves 24%.
The preparation of capacitive deionization electrode：By obtained graphene/NiO nano composite aerogels and acetylene black, gather inclined fluorine
Ethene in mass ratio 8:1:1 mixing, adds appropriate 1-METHYLPYRROLIDONE solvent, is stirred continuously to uniform, is applied to graphite paper
On, 150 DEG C of dryings 2 hours.Obtain composite electrode piece.
Desalting performance is tested：Above-mentioned made capacitive deionization electrode and device are assembled, desalination test is carried out.100mL
500mg/lNaCl prepare liquids are circulated with 25mL/min flow velocitys, the additional 1.3v direct currents of adsorption process.Voltage is treated by conductivity meter
Survey liquid change in concentration to be detected in real time, the adsorbance for drawing graphene/NiO nano composite aerogel electrodes is 8.1mg/g.
Comparison example 1
The preparation method be the same as Example 1 of graphite oxide.200mg graphite oxides are taken to be dissolved in 100mL deionized waters, ultrasound point
1h is dissipated, to being completely dissolved.The water nickel nitrates of 1.1632g six are dissolved in 20mL deionized waters and added water-soluble to above-mentioned graphite oxide
In liquid, ultrasonic disperse 1h.0.9610g urea is dissolved in 20mL deionized waters and added in above-mentioned mixed liquor, ultrasonic disperse 1h.
Above-mentioned solution is moved in 200mL reactors, under the conditions of 180 DEG C, 14h is reacted.Product is washed with deionized for several times, and freezing is dry
Dry 12h.Under nitrogen atmosphere, with 10 DEG C/min programming rates to 180 DEG C of calcining 4h, the nano combined airsettings of graphene/NiO are obtained
Glue.Electrochemical results show, when current density is 1A/g, measure specific capacitance for 220F/g, purer graphene aerogel
(190F/g) improves 15%.
The preparation of capacitive deionization electrode：By obtained graphene/NiO nano composite aerogels and acetylene black, gather inclined fluorine
Ethene in mass ratio 8:1:1 mixing, adds appropriate 1-METHYLPYRROLIDONE solvent, is stirred continuously to uniform, is applied to graphite paper
On, 150 DEG C of dryings 2 hours.Obtain composite electrode piece.
Desalting performance is tested：Above-mentioned made capacitive deionization electrode and device are assembled, desalination test is carried out.100mL
500mg/lNaCl prepare liquids are circulated with 25mL/min flow velocitys, the additional 1.3v direct currents of adsorption process.Voltage is treated by conductivity meter
Survey liquid change in concentration to be detected in real time, the adsorbance for drawing graphene/NiO nano composite aerogel electrodes is 5.2mg/g.
Comparison example 2
The preparation method be the same as Example 1. of graphite oxide takes 200mg graphite oxides to be dissolved in 100mL deionized waters, ultrasound point
1h is dissipated, to being completely dissolved.The water nickel nitrates of 1.1632g six are dissolved in 20mL deionized waters and added water-soluble to above-mentioned graphite oxide
In liquid, ultrasonic disperse 1h.0.9610g urea is dissolved in 20mL deionized waters and added in above-mentioned mixed liquor, ultrasonic disperse 1h.
Above-mentioned solution is moved in 200mL reactors, under the conditions of 180 DEG C, 14h is reacted.Product is washed with deionized for several times, and freezing is dry
Dry 12h.Under nitrogen atmosphere, with 10 DEG C/min programming rates to 400 DEG C of calcining 4h, the nano combined airsettings of graphene/NiO are obtained
Glue.Electrochemical results show, when current density is 1A/g, measure specific capacitance for 170F/g, because temperature is too high, for
Graphene aerogel causes damage, and causes electric capacity to reduce.
Claims (9)
1. a kind of graphene/NiO nano composite aerogel capacitive desalination electrodes, including electrode material and graphite paper substrates, it is special
Levy and be：The electrode material includes graphene/NiO nano composite aerogel components；The nano combined gas of graphene/NiO
Gel is made up of nano NiO growth in situ in the surface of three-dimensional network shape graphene aerogel and its hole.
2. graphene according to claim 1/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：It is described
Electrode material is made up of graphene/NiO nano composite aerogels, conductive agent and binding agent.
3. graphene according to claim 1 or 2/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：
The electrode material is by graphene/NiO nano composite aerogels, acetylene black and Kynoar in mass ratio 7~9:0.5~
1.5:0.5~1.5 composition.
4. graphene according to claim 3/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：It is described
Graphene/NiO nano composite aerogels are prepared by following methods：Solution containing graphite oxide and nickel salt and precipitating reagent,
Hydro-thermal reaction is carried out at a temperature of 140 DEG C~220 DEG C, presoma is obtained；The presoma is placed in protection gas after freeze-drying
Under atmosphere, it is heat-treated, is produced at a temperature of 200 DEG C~300 DEG C.
5. graphene according to claim 4/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：It is described
In solution containing graphite oxide and nickel salt and precipitating reagent the concentration of graphite oxide be 0.1~4g/L, the concentration of nickel salt be 0.01~
The concentration of 0.06mol/L and precipitating reagent is 0.03~0.3mol/L.
6. graphene according to claim 5/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：It is described
Nickel salt and precipitating reagent mol ratio are 1 in solution containing graphite oxide and nickel salt and precipitating reagent:3~5.
7. graphene according to claim 6/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：It is described
Nickel salt is at least one of nickel chloride, nickel nitrate, nickel sulfate.
8. graphene according to claim 6/NiO nano composite aerogel capacitive desalination electrodes, it is characterised in that：It is described
Precipitating reagent is at least one of urea, ammoniacal liquor, ammonium hydrogen carbonate.
9. the preparation method of graphene/NiO nano composite aerogel capacitive desalination electrodes described in any one of claim 1~8,
It is characterized in that：Graphene/NiO nano composite aerogels are mixed with conductive agent and binding agent, stone is coated in by rubbing method
In black paper substrates, dry, produce.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962632A (en) * | 2018-07-27 | 2018-12-07 | 青岛科技大学 | A kind of graphene/nitrogen-doped carbon/nickel nickel composite material and preparation method thereof |
| CN109701575A (en) * | 2018-12-11 | 2019-05-03 | 武汉工程大学 | A kind of nitrogen, NiP/ graphene composite aerogel of phosphorus doping and preparation method thereof |
| CN109851284A (en) * | 2019-04-15 | 2019-06-07 | 福建农林大学 | Multiple elements design aerogel material and its preparation and its application in electro-magnetic wave absorption |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982408A (en) * | 2010-10-20 | 2011-03-02 | 天津大学 | Graphene three-dimensional material as well as preparation method and application thereof |
| US20120026643A1 (en) * | 2010-08-02 | 2012-02-02 | Zhenning Yu | Supercapacitor with a meso-porous nano graphene electrode |
| CN103094540A (en) * | 2013-01-06 | 2013-05-08 | 中物院成都科学技术发展中心 | Method for compounding graphene and metallic oxide/metallic compound and composite material thereof |
| CN103413689A (en) * | 2013-07-19 | 2013-11-27 | 北京科技大学 | Method for preparing graphene aerogel and graphene/ metallic oxide aerogel |
| CN103943379A (en) * | 2014-03-24 | 2014-07-23 | 上海大学 | Preparation method for graphene load flower-shaped porous nickel oxide composite materials |
| CN104916457A (en) * | 2015-05-25 | 2015-09-16 | 淮北师范大学 | Electrochemical capacitor and electro-adsorption desalination electrode material |
-
2017
- 2017-05-19 CN CN201710359043.2A patent/CN107140717A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120026643A1 (en) * | 2010-08-02 | 2012-02-02 | Zhenning Yu | Supercapacitor with a meso-porous nano graphene electrode |
| CN101982408A (en) * | 2010-10-20 | 2011-03-02 | 天津大学 | Graphene three-dimensional material as well as preparation method and application thereof |
| CN103094540A (en) * | 2013-01-06 | 2013-05-08 | 中物院成都科学技术发展中心 | Method for compounding graphene and metallic oxide/metallic compound and composite material thereof |
| CN103413689A (en) * | 2013-07-19 | 2013-11-27 | 北京科技大学 | Method for preparing graphene aerogel and graphene/ metallic oxide aerogel |
| CN103943379A (en) * | 2014-03-24 | 2014-07-23 | 上海大学 | Preparation method for graphene load flower-shaped porous nickel oxide composite materials |
| CN104916457A (en) * | 2015-05-25 | 2015-09-16 | 淮北师范大学 | Electrochemical capacitor and electro-adsorption desalination electrode material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962632A (en) * | 2018-07-27 | 2018-12-07 | 青岛科技大学 | A kind of graphene/nitrogen-doped carbon/nickel nickel composite material and preparation method thereof |
| CN109701575A (en) * | 2018-12-11 | 2019-05-03 | 武汉工程大学 | A kind of nitrogen, NiP/ graphene composite aerogel of phosphorus doping and preparation method thereof |
| CN109851284A (en) * | 2019-04-15 | 2019-06-07 | 福建农林大学 | Multiple elements design aerogel material and its preparation and its application in electro-magnetic wave absorption |
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